Carbureter.



Patented Mar. 21, 1916.

W Smaflboz L. V. FLECHTER.

C-ARBUR ETER. APPLICATION FILED APR.19, 191a. RENEWED AUG. 7, 191 s. 1,17,729

LEONARD V'. FLECHTER, OF NEW YORK, 1\T. Y., ASSIGNOR T Il. V. FLECHTER &

' COMPANY, A CORPORATION OF NEW. YORK.

GARBURETER.

Specification of Letters Patent.

Patented Mar. 21, 19116.

Application filed April 19, 1913, Serial No. 762,298. Renewed August 7, 1915. Serial No. 44,290.

To all whom it may concern l? e it known that I, LEONARD V. FLEOHTER, a cltizen. of the United States, residing in the city, county, and State of New York,

. novel features of construction will be particularly pointed out in the claims.

In the accompanying drawing the figure illustrates a sectionalelevation of a carbureter embodying my invention.

The fuel is supplied by a tube which is connected to the nipple 1, screwed into the casing of the float chamber 2, containing the float 3. The latter operates the lever 4 connected to the needle valve 5 projecting into the interior opening of the nipple. en the level of the liquid'rises in the float-chamber, the float operates the needle valve to shut off the supply of fuel in the usual man ner. The fuel nozzle 6 communicates through a passage 7 with the float chamber and sprays the oil into the Venturi tube 8. The main air supply is admitted into the Venturi tube through an apertured cup 11 attached to the projecting end 12 of the tube which extends to the exterior of the casing. 0

When the speed'of' the engine rises to a point at which the main alrsupply is inadequate, the increased suction opens the auxiliary air valve 14 against the tension ;of springs 15' and 16 to admit an additional air supply. The valve bushing 14* is ad ustable for the purpose of regulating the tension of spring 15, and the stem 14", which is screw threaded in the extension of the bushing, is adjustable for the purpose of varying theposition of the spring 16 with reference to the valve. 1

When the engine is first started, it is advantageous to get as high a suction as possible in order to start the flow of the fuel through nozzle 6. To obtain this high suction, I provide simple, positive and efic ent means whereby the main and auxiliary air supplies are cut off simultaneously by a simple movement of a part controlled by the operator. To this end I attach to the cup 11 a horn 17 and extend the same to a point below the stem 14 of the auxiliary air supply valve 14. Mounted upon suitable bosses on the horn 17 is a butterfly valve 19 which 1s rotated on a horizontal'axis by an arm 20 connected to any suitable manipulating means located at any convenient point within the vehicle. One of the wings of the valve is disposed under a tubular projection 21, extending upward from the horn in alinement with the stem 14*, A cartridge 22 18. mounted in this tubular projection 21 and is adapted to abut a shell 23, slidably mounted upon the lower end of the stem and pro ecting downward through an aperturein the casing. The shell is capable of longitudinal movement with reference to the stem, this movement being limited by a'pin 27 projecting into longitudinal slots 28 formed 1n the shell. The upper end of the latter serves as an abutment for the spring 16, and when the shell is raised it actuates this spring to close the valve 14. A spring 26 within the shell normally holds the same in its lowermost position and prevents it from rattling by reason of the jarring of the vehicle. The cartridge contains a spring 24 therein which holds in projected position a plunger 25. When the operator turns the arm 20 so as to close the valve 19, the wing of this valve which abuts the plunger 25 of the cartridge 22 lifts the latter into contact withthe shell 23, which in turn through the intermediary of spring 16 closes'the auxiliary valve 14. The spring 24 within the cartridge gives assurance that no undue strain will be imposed upon the valve 19 in case of an excess of resistance offered by the valve 14 dueto a lower adjustment of the valve bushing, or in case the shell 23 is moved upward to the extreme limit of its movement, as determined by the pin 27, before the valve 19 has completely closed.

H To prevent the formation of a too high degree of vacuum in the engine when both of the air valves are closed, I preferablyform a notch 30 in the valve 19 which at such time admits a small amount of air into 7 I air valve when said main air valve is closed. I

5. In a carbureter, a fuel spraying nozzle,

the valve 19 is direct and positive in its action and is free from cams or other parts which are liable to get out of order. Provision is made for the taking up of lost motion and for preventing undue strain upon the parts. The device as a whole operates positively and efliciently and-is neat in outward appearance. Furthermore, this construction permits of the use of the main. air valve as a so-called dash adjustment, that is to say, an adjustment of the carbureter for changing the quality of the mix ture arranged to be controlled by a suitable manipulating means, usually placed on the dash of the vehicle. In such case the manipulating means might be connected to the lever 20 and used either to entirely close both of the air valves for starting the engine or simply to cut down the proportion of air in the mixture by partially closing the main air valve without affecting the auxiliary air valve.

Having thus described my invention, I claim v 1,. A carbureter comprising a fuel spraying nozzle, main and auxiliary air supply ducts, valves for shutting ofi' said main and auxiliary air supplies and means for simultaneously closing said valves, said means comprising a yielding member adapted to transmit the movement of one of said valves to the other of said valves.

2. A carbureter comprising a fuel spraying nozzle, main and auxiliary air supplies, a positively actuated valve for controlling said main air supply, an automatically operated valve controlling said auxiliary air supply, and means for automatically increasing the resistance to opening of the auxiliary valve after the main valve is'partially closed.

3.' A carbureter comprising a fuel spraying nozzle, main and auxiliary air supply ducts, a positively actuated valve for shutting off the main air supply, a valve controlling the auxiliary air supply, a spring normally connected to the auxiliary valve to resist the opening thereof, a second spring normally out of contact with said auxiliary valve, and means operated by the main valve 7 in its partially closed position to bring said second spring into position to resist the opening of said auxiliary valve.

4. In a' carbureter, a fuel spraying nozzle, main and auxiliary air valves, a spring against which said auxiliary valve may abut at one end thereof, a movable element engaging this spring at the other end thereof, a yielding member engaging said movable member, said yielding member being actu-' ated by the main air valve and operating through said spring to close the auxiliary a main air duct, a valve in said main air 6. In a carbureter, a fuel spraying nozzle,

a main air duct, a valve in said main air duct mounted upon a Horizontal axis therein, an auxiliary air valve, a relatively stationery stem upon which said auxiliary air valve is guided, a spring mounted on said stem against which said auxiliary air valve may abut, a shell mounted upon the lower end of the stem and engaging the spring, means for limiting the movement of the shell upon the stem and a longitudinally movable member disposed in alinement with said shell and actuated by the main air valve to close the auxiliary valve through said shell and spring when said main air valve is closed.

7 In a carbureter, a fuel spraying nozzle, a main air duct, a valve in said main air duct mounted upon a horizontal axis there-' m, an auxiliary air valve, a relatively stationary stem upon which said auxiliary air valve is guided, a spring mounted on said stem against which said auxiliary air valve may abut, a slotted shell mounted upon the lower end of the stem and engaging the spring, projections extending from the stem into the slots of the shell and limiting the movement of the same, and a longitudinally movable member disposed in alinement with said shell and actuated by the main air valve toclose the auxiliary valve through .said shell and spring when said main air valve is closed.

8. In a carbureter, a fuel spraying nozzle, a main air duct, a valve in said main air duct mounted upon a horizontal axis therein, an auxiliary air valve, a relatively stationary stem upon which said auxiliary air valve is guided, a spring mounted on said stem against which said auxiliary air valve may abut, a shell mounted upon the lower end of the stem and engaging the spr ng a spring located within the shell to maintain the same in depressed position, means for limiting the movement of the shell upon the stem and a longitudinally movable member disposed in alinement with said shell and actuated by the main air valve to close the auxiliary valve through said shell and spring when said main air valve is closed.

9. In a carbureter, a fuel spraying nozzle, a main air duct, a butterfly valve mounted in said main air duct to rotate about a horizontal axis, said air duct being provided with a tubular extension above one of the wings of said valve, a cartridge mounted in said tubular extension, said cartridge consisting of two relatively movable portions, a spring within the cartridge tending to maintain said portions in extended relation, an auxiliary air supply valve locatedabove said main valve, a relatively stationary stem upon which said auxiliary air valve is guided, a spring upon said stem abutting the auxiliaryvalve, a movable member.

mounted upon said stem supporting the lower end of the spring, said movable member being'disposed in alinement with said cartridge and adapted to be actuated thereby when the mainair valve is closed, and through the inter mediary of the spring to close said auxiliary air valve.

10. In a carbu'reter, a fuel spraying nozzle, a main air duct, a butterfly valve mounted in said main air duct to rotate about a horizontal axis, said air duct being provided with a tubular extension above one ofthe wings of said valve, a cartridge mounted in e said tubular extension, said cartridge consisting of two relatively movableportions, a spring within the cartridge tending to maintain said portions in extended relation, an auxiliary air supply valve located above said main valve, a relatively stationary stem upon which said auxiliary air valve is guided, a spring upon said stem adapted to abut the auxiliary valve, a shell mounted upon the lower end of the stem and supporting the spring, said shell having slots therein into which a projection from the stem extends, a spring within the shell maintaining the same in depressed position, said stem and shell being insubstantial alinement with the cartridge, the latter being adapted to be actuated upon the closure of the main valve to close said auxiliary valve through the intermediary of the shell and spring.

This specification signed and witnessed this 2nd day of April, A. D. 1913.

LEONARD V. FLECHTER, Signed in the presence of M. P. WINNE,

Dono'rnx DAMES. 

